Ventilation around the top and ends of this box make it a first choice for making splits or increases in your bee yard. Made of one piece corrugated plastic for durability and strength. The best all around Nuc box on the market. It ships as a flat piece. The customer folds the corrugated plastic to make the nuc box.Holds 5 wooden deep frames with or without foundation (frames not included) Ship wt. 5 lbs. dimensional wt. ** PICK UP ONLY due to size **